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2,128 Articles
5,996 Members
107 Directory Listings
126,123 Followers

The world's best gem articles, published weekly.

Most Recent Articles

Wulfenite Value, Price, and Jewelry Information

Although aesthetically magnificent wulfenite crystals are often too thin, soft, and sensitive to cut for jewelry, rare faceted pieces are greatly prized by collectors. The red of wulfenite, especially from the Red Cloud Mine in Arizona, is one of the richest colors in nature.

A Simple Method for Transposing Faceting Angles

Can something akin to a slide rule help novice faceters today with transposing faceting angles from published gem designs? Check out the calculation-free nomogram method.

What Is Gemstone Transparency?

Gemstone transparency describes how much light passes through a gem and how it scatters. Learn what causes a gem to be opaque, translucent, or transparent.

The Foundation Stones of the New Testament

Commentaries on the foundation stones of the Book of Revelation influenced the development of the Western birthstone system. Learn more about this connection.

Wavellite Value, Price, and Jewelry Information

Wavellite is a very attractive mineral, well-known to collectors. Its radial aggregate crystal clusters can be cut into extremely interesting stones.

How to Calculate the Jeweler’s Markup for Gold Jewelry

If you learn the meaning of the trade terms for gold weight and karat, you can calculate the gold content value of any item as well as the jeweler’s markup.

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Jeweler, IGS Pro Member

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Over 15 years, we have assembled detailed pricing and value information for appraising over 70 different gemstones. The values in our guide come from a variety of sources including primary and secondary gemstone dealers, jewelers, miners, and wholesale suppliers of commonly traded gemstones.

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